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US Patent: 4,205,543
Spring Winder
Richard D. Wright - Kenosha, WI

USPTO Classifications:
140/124, 72/138, 72/143

Tool Categories:

Snap-On Tools Corp. - Kenosha, WI

Not known to have been produced

none listed

Patent Dates:
Applied: Jul. 31, 1978
Granted: Jun. 03, 1980

Patent Pictures:
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Snap-On Tools Company History
Vogel, Dithmar, Stotland, Stratman & Levy - patent attorneys


A spring winder includes a base and a mandrel rotatably held against the base by a pair of mounting blocks which include aligned grooves in which the mandrel is seated. Each block is connected to the base by a pair of mounting screws which cooperate with associated compression springs for resiliently holding the mandrel between the mounting blocks and the base with a variable force. A length of spring wire is fed between a cam and washer rotatably mounted on the side of the base by means of an adjustment screw, the wire then being fed through an aperture in the adjacent end of the mandrel. The cam and washer are resiliently urged together by a compression spring for applying a drag to the wire which is variable by adjustment of the associated screw. A pin on the washer rides in a complementary groove in the cam for retaining the wire in position. As the mandrel is rotated the wire is wound thereon against the drag of the cam and washer to form a series of helical coils. The cam has a wedge-shaped camming surface thereon which is insertable between adjacent coils of the wire on the mandrel to establish the spacing between adjacent coils. Rotation of the cam permits adjustment of this spacing. A double-wedge cam is also disclosed for forming either right-hand or left-hand springs.

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